Re: [R] parameterization question

You could try using the non-formula interface to aggregate. Note that the following two calls to aggregate are equivalent but the second (using the non-formula interface) makes the response column a variable: > df <- data.frame(Y1=1:10, Y2=101:110, Group=rep(letters[1:3], c(3,3,4))) > aggrega

[R] parameterization question

How can I parameterize the function call to aggregate() below with colx (a character string) in the following code? That is, replace both if statements with aaa <- aggregate(colx_something, data=tidy[grpyrs,],sum). I've tried a couple of ideas for "colx_something" but get an R-error each time. B